Question: Show that the vertical distance between the line y = (b/a)x and the upper half of the right-hand branch y = (b/a)x 2 - a

Show that the vertical distance between the line y = (b/a)x and the upper half of the right-hand branch y = (b/a)√x2 - a2 of the hyperbola (x2/a2) - (y2/b2) = 1 approaches 0 by showing thatlim b (2x - x - a) - lim (x - b


Similar results hold for the remaining portions of the hyperbola and the lines y = ±(b/a)x.

lim b (2x - x - a) - lim (x - b = ax lim (x - x a) = 0. -

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